Nokogiri法误差
Nokogiri法误差
提问于 2016-11-03 20:08:49
我正在使用Nokogiri作为一个工具来帮助我做一个我正在为学校工作的项目。现在，该项目的思想是搜索HTML文档，以查找用户提供的关键字。该函数将在<body>元素之后查找HTML中的所有关键字，除非关键字出现在HTML中，然后用标记包围找到的字符串，以突出显示‘’关键字。现在，我的代码出现了严重的错误调用堆栈失败。主要错误是: Nokogiri::CSS::SyntaxError:unexpected'$'after'':substring_match，“简单”(Nokogiri：：CSS：：SyntaxError)
我当前的方法：
require 'nokogiri'
file = File.open ("desktop/Personal/code.HTML")
@doc = Nokogiri::HTML(file)
puts @doc
puts "Welcome to the HTML keyword highlighter!"
puts "Please enter a keyword"
keyword = gets.chomp
highlight = "<span style='background-color: yellow; color: black'>#{keyword}</span>"
search = @doc.xpath("//body").search("[text()*=#{keyword}")
search.each do |node|
nodeN = node.name
nodeH = node.content.gsub(keyword, highlight)
node.replace(nodeH)
end
file.close错误调用堆栈：
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2. 0.0/gems/nokogiri-1.5.6/lib/nokogiri/css/parser_extras.rb:87:in `on_error': unexpected '$' after '[:substring_match, "simple"]' (Nokogiri::CSS::SyntaxError)
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/racc/parser.rb:258:in `_racc_do_parse_c'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/racc/parser.rb:258:in `do_parse'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/css/parser_extras.rb:62:in `parse'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/css/parser_extras.rb:79:in `xpath_for'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/css.rb:23:in `xpath_for'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:111:in `block (2 levels) in css'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:109:in `map'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:109:in `block in css'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:105:in `css'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:81:in `block in search'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:80:in `each'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:80:in `search'
from /Users/Eva/Desktop/Personal/Project_Nokogiri.rb:21:in `<main>'任何关于如何防止这件事的建议都是非常感谢的！我刚开始编程，Ruby和Nokogiri，所以我对如何自己解决这个问题知之甚少。如果格式设置不好，很抱歉。谢谢你的帮助！
回答 1
Stack Overflow用户
发布于 2016-11-04 01:47:04
你忘了关闭方括号：
search = @doc.xpath("//body").search("[text()*=#{keyword}]")我会加引号以防万一：
search = @doc.xpath("//body").search("[text()*=\"#{keyword}\"]")(如果双引号在keyword中是防弹的，您也可以通过确保双引号转义来扩展它)
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/40410368
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号